Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882924 | Method and apparatus for manufacturing hollow cylindrical guide roller for magnetic recording tape | Takayuki Kohama | 1989-11-28 |
| 4812480 | Composition for administration through a body cavity | Osamu Shirakura, Kiyohisa Ouchi, Sueaki Ishimaru | 1989-03-14 |